O₂ content in atmospheric air on weight basis is

Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on weight basis is

0.3

0.4

0.23

0.21

0.3

0.4

0.23

0.21

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Steam Boilers, Engines, Nozzles and Turbines
Steam in water tube boiler as compared to fire tube boiler

Can be raised rapidly

Is raised at slower rate

Could be raised at fast/slow rate depending on design

Is raised at same rate

Can be raised rapidly

Is raised at slower rate

Could be raised at fast/slow rate depending on design

Is raised at same rate

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Steam Boilers, Engines, Nozzles and Turbines
The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

Dry

Remain dry saturated

Superheated

Wet

Dry

Remain dry saturated

Superheated

Wet

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Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation is defined as

The ratio of heat actually used in producing the steam to the heat liberated in the furnace

The evaporation of 15.653 kg of water per hour from and at 100°C

The amount of water evaporated or steam produced in kg per kg of fuel burnt

The amount of water evaporated from and at 100°C into dry and saturated steam

The ratio of heat actually used in producing the steam to the heat liberated in the furnace

The evaporation of 15.653 kg of water per hour from and at 100°C

The amount of water evaporated or steam produced in kg per kg of fuel burnt

The amount of water evaporated from and at 100°C into dry and saturated steam

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Steam Boilers, Engines, Nozzles and Turbines
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

More than

Less than

None of the listed here

Equal to

More than

Less than

None of the listed here

Equal to

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Steam Boilers, Engines, Nozzles and Turbines
Spontaneous combustion is a phenomenon in which

All the fuel burns instantaneously producing high energy release

Fuel burns with less air

Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal

Explosion in furnace

All the fuel burns instantaneously producing high energy release

Fuel burns with less air

Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal

Explosion in furnace

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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines O₂ content in atmospheric air on weight basis is

Steam Boilers, Engines, Nozzles and Turbines Steam in water tube boiler as compared to fire tube boiler

Steam Boilers, Engines, Nozzles and Turbines The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

Steam Boilers, Engines, Nozzles and Turbines The equivalent evaporation is defined as

Steam Boilers, Engines, Nozzles and Turbines In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

Steam Boilers, Engines, Nozzles and Turbines Spontaneous combustion is a phenomenon in which

Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on weight basis is

Steam Boilers, Engines, Nozzles and Turbines
Steam in water tube boiler as compared to fire tube boiler

Steam Boilers, Engines, Nozzles and Turbines
The dry saturated steam at very high pressure (150200 kg/cm²) when throttled to atmosphere will become

Steam Boilers, Engines, Nozzles and Turbines
The equivalent evaporation is defined as

Steam Boilers, Engines, Nozzles and Turbines
In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.

Steam Boilers, Engines, Nozzles and Turbines
Spontaneous combustion is a phenomenon in which